PLAN B analog blog

--- In PLAN_B_analog_blog@yahoogroups.com, "(i think you can figure
that out)" <peter@...> wrote:
>
> All,
> 
> We have discovered an error in the programming of the Model 28 Tapper.
>  There's a fix - please read on.
> 
> There are two input pins on the microprocessor which determine which
> of the three SERIAL output states (quarter note/eight/triplet) are
> passed through.  These are fed by two external window comparators. One
> input gives indication that the voltage at the SELECT INPUT is over
> 2.5 volts, one if it's between 2.5 and 5.5 volts.
> 
> Well, there was a mis-communication and it seems either I told my
> programmer the pins in the wrong order, or he reversed it - that
> doesn't matter - the issue is they are reversed in the first 15 units
> shipped.  Everything does it's thing - but because the info the micro
> receives is not coded correctly, the voltage levels required to do
> that decoding are not as outloined in our spec sheet.
> 
> I do not have a database of who purchases our products from our
> dealers.  What I am asking you to do is test this function and if it
> is determined that they do NOT behave as outlined in the M28 product
> page on our site, that you return U1 -- the 20 pin dip IC labeled
> either ATMEL AT89C2051-12 or -24 to us and we will reprogram it and
> send it back immediately.  There are letters after the -12 and -24 -
> those don't matter, U1 is the bugger that need to be reprogrammed.
> 
> The part can easily be removed from it's socket through the use of
> either a chip-puller or a small flat-blade screwdriver.
> 
> The address to send that is:
> 
> Electro-Acoustic Research
> 10870 Camarillo St.
> Toluca Lake, CA
> 91602
> 
> Please pardon this error, we wil do everything required to get you
> back on the road as quickly as possible.
> 
> - P

Is it possible to do it by myself. I am located in germany and the
shipping will be nearly 30 €.

Greetz from Hamburg
>